TY - JOUR
T1 - Competition and the evolution of aggressive behavior in two species of terrestrial salamanders.
AU - Nishikawa, K. C.
PY - 1985
Y1 - 1985
N2 - Plethodon jordani and P. glutinosus are closely related, ecologically similar species that are sympatric at intermediate elevations in the S Appalachian Mountains. Interspecific competition is more intense in the NE Great Smoky Mountains, where the species are narrowly sympatric, than in the nearby Balsam Mountains, where sympatry is broader. In laboratory encounters, P. glutinosus from the Great Smoky Mountains were more aggressive to heterospecific and conspecific intruders than were P. glutinosus from the Balsam Mountains. For P. jordani, however, the variation in interspecific and intraspecific aggressive behavior among individuals within populations was as great as the variation between populations. Alpha-selection (ie improved competitive ability by the acquisition of interspecific interference mechanisms) has occurred in populations of P. glutinosus under conditions of intense interspecific competition. The evolution of aggressive behavior also appears to have been influenced by the intensity of intraspecific competition. -from Author
AB - Plethodon jordani and P. glutinosus are closely related, ecologically similar species that are sympatric at intermediate elevations in the S Appalachian Mountains. Interspecific competition is more intense in the NE Great Smoky Mountains, where the species are narrowly sympatric, than in the nearby Balsam Mountains, where sympatry is broader. In laboratory encounters, P. glutinosus from the Great Smoky Mountains were more aggressive to heterospecific and conspecific intruders than were P. glutinosus from the Balsam Mountains. For P. jordani, however, the variation in interspecific and intraspecific aggressive behavior among individuals within populations was as great as the variation between populations. Alpha-selection (ie improved competitive ability by the acquisition of interspecific interference mechanisms) has occurred in populations of P. glutinosus under conditions of intense interspecific competition. The evolution of aggressive behavior also appears to have been influenced by the intensity of intraspecific competition. -from Author
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U2 - 10.1111/j.1558-5646.1985.tb05694.x
DO - 10.1111/j.1558-5646.1985.tb05694.x
M3 - Article
AN - SCOPUS:0022213263
SN - 0014-3820
VL - 39
SP - 1282
EP - 1294
JO - Evolution; international journal of organic evolution
JF - Evolution; international journal of organic evolution
IS - 6
ER -